ABSTRACT.
The results of the evaluation of the effect of Quercus cortex plant extract in carp feeding are presented. It was found that the introduction of Quercus cortex in the diet of fish in the amount of 1 and 2 ml/kg of live weight
is associated with an increase in growth intensity. In the experimental groups a reliable increase in the concentration of
trace elements in muscle tissue was recorded: Fe, B, Co, Mn, Si. Analysis of toxic elements showed a significant increase in the level of Sr and Al only at the minimum dose of the extract administration. No significant differences in the
content of Cd, Pb, Hg, Sn were recorded.
KEYWORDS: quorum sensing, fish feeding, micronutrients.
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